Fix hotplugging issues with saa7134

From: Ricardo Cerqueira <v4l@cerqueira.org>

- Fixed issue with hotplugging and DMA sound (sound was lost when replugging
  a card)
- Added notifiers to main saa7134 module to let the sound sub-modules know
when a card has been inserted or removed

Signed-off-by: Ricardo Cerqueira <v4l@cerqueira.org>

1 files changed, 17 insertions, 1 deletions

diff --git a/linux/drivers/media/video/saa7134/saa7134-core.c b/linux/drivers/media/video/saa7134/saa7134-core.c
index 76e228456..985a053ab 100644
--- a/linux/drivers/media/video/saa7134/saa7134-core.c
+++ b/linux/drivers/media/video/saa7134/saa7134-core.c
@@ -1,5 +1,5 @@
 /*
- * $Id: saa7134-core.c,v 1.55 2005/11/09 18:30:51 mchehab Exp $
+ * $Id: saa7134-core.c,v 1.56 2005/11/16 03:34:21 rmcc Exp $
  *
  * device driver for philips saa7134 based TV cards
  * driver core
@@ -108,6 +108,9 @@ LIST_HEAD(saa7134_devlist);
 static LIST_HEAD(mops_list);
 static unsigned int saa7134_devcount;
 
+int (*dmasound_init)(struct saa7134_dev *dev);
+int (*dmasound_exit)(struct saa7134_dev *dev);
+
 #define dprintk(fmt, arg...)	if (core_debug) \
 	printk(KERN_DEBUG "%s/core: " fmt, dev->name , ## arg)
 
@@ -1087,6 +1090,10 @@ static int __devinit saa7134_initdev(struct pci_dev *pci_dev,
 	/* check for signal */
 	saa7134_irq_video_intl(dev);
 
+	if (dmasound_init && !dev->dmasound.priv_data) {
+		dmasound_init(dev);
+	}
+
 	return 0;
 
  fail4:
@@ -1110,6 +1117,11 @@ static void __devexit saa7134_finidev(struct pci_dev *pci_dev)
 	struct list_head *item;
 	struct saa7134_mpeg_ops *mops;
 
+	/* Release DMA sound modules if present */
+	if (dmasound_exit && dev->dmasound.priv_data) {
+		dmasound_exit(dev);
+	}
+
 	/* debugging ... */
 	if (irq_debug) {
 		u32 report = saa_readl(SAA7134_IRQ_REPORT);
@@ -1141,6 +1153,7 @@ static void __devexit saa7134_finidev(struct pci_dev *pci_dev)
 	saa7134_i2c_unregister(dev);
 	saa7134_unregister_video(dev);
 
+
 	/* the DMA sound modules should be unloaded before reaching
 	   this, but just in case they are still present... */
 	if (dev->dmasound.priv_data != NULL) {
@@ -1148,6 +1161,7 @@ static void __devexit saa7134_finidev(struct pci_dev *pci_dev)
 		dev->dmasound.priv_data = NULL;
 	}
 
+
 	/* release resources */
 	free_irq(pci_dev->irq, dev);
 	iounmap(dev->lmmio);
@@ -1243,6 +1257,8 @@ EXPORT_SYMBOL(saa7134_boards);
 
 /* ----------------- for the DMA sound modules --------------- */
 
+EXPORT_SYMBOL(dmasound_init);
+EXPORT_SYMBOL(dmasound_exit);
 EXPORT_SYMBOL(saa7134_pgtable_free);
 EXPORT_SYMBOL(saa7134_pgtable_build);
 EXPORT_SYMBOL(saa7134_pgtable_alloc);